Improvement in gauges for gang-saws



0. C. MEIGS.

Gage for Gang Saws.

Patented Nov. 29A, '1870.'

NA PETERS, Prhwuomgnpmr. wuningnm n. o

@tutti diffus.

OLIVER CARPENTER MEIGS, or DUBUQUafIoWA.

Letters Patent No. 109,643, dated November 29, 1870.

IMPROVEMENT lNfGAUGES 'R GANG-SAWS.

The Schedule referred to in these Letters Patent and making part of thesame.

To all 'll-hom 'it Imay concern:

Be it known that I, OLIVER CARPENTER Mures', et Dubuque, in the countyof'Dubuque and State of Iowa, have-invented a newamlusetnl Improvementiu Gang-Saws and l'do hereby declare that the following is a full,clear, aml -exact description thereof, which will enable others skilledin the art to make and use the same, reference being had to theaccompanyingdrawing l'orming part nl' this specification, in which-Figure 1 represents a iront viewot' my improved gang-saw.

.Figure 2 same.

Figure 3 a horizontal section of the same.

Similar letters ot' ret'erence indicato` corres'ymmling parts.

My invention relates to gang-saws, and consists in is a side view,partly in section, ot' the improvements thereon7 namely, in thepeculiar' construction ot' the notched gauge-bars so that tho main.central portion shall be ot' iron and the'side plates of hard steel', toprevent wear.

A, in the drawing, represents the ii'ame in which the saws are to besecured. l

The upper part ot this trame is made slotted, to receive the shauks aot' the upper coupling-plates 15.

The lower part ofthe frame A has a projecting rih or tlange, b, overwhich hooks, c, on the. lower coupling-plates C, are made to catch l). Dare the saws.

lhey have at their ends` projecting ribs, ll d, which being ou bothsides, as shoumconstitute heads for holding the saws in place. p

The ribs d are riveted or otherwise fastened to the saw-blades.

The couilinf-ilates B (J are both U'rooved and C1 C slottedv in thenmnner shown, t'or the purpose ot' receiving the ends oi' thesaw-blades, with the heads ot` the. same. f

The upper couplings have projecting shanks, a, that project through theupper part of the frame, and receive wedges, c c,- to hold them inplace. The lower couplings have hooks, c c, pivoted to ythem, whichcatch over the rib b 011 the lower :part of t ie frame.

From the trame project, forward and backward, slotted arms, 1') it),which serve to hold the front gauges l andthe rear gauges G., Thesegauges are transverse bars, notched-to fit the couplings and -hoid themthe requisite distance apart. They are formed ot' a central piece ofiron, to which is riveted, on each side, a plate ol' steel, to preventthe wear of' lateral friction.

By moans ol'jam-nuts ff the gauges are locked to the arms E.

The two front gauges F F are far enough apart from each other toentirely bclear the saw-blades. The rear gauges G- G, however, arecloser together, as shown in iig. 2, so that the saws are supported bythem in rear. Thus, during the process of sawing, the gauges G serve tosupportthc saws, preventing the same from rocking backward.

When a saw is to be removed itean at once be iit'ted out oi' thecouplings that hold it, the front gauges not beingin the way, to preventsuoli removal. y

B v means ofthe wedges, or their equivalents, the saws can at all timesbe properly strained.

1)', in the drawing, represents a saw secured in the ordinary manuel'.

Itis, by means of pins g, fitted to the upper and riveted tothe lowerfastening, and isat both ends clearly in the way ot' the trout gauges,so that it can only be removed by tirst taking away the said gauges. y

I Iaving thus described my invention,

l claim as new and desire to secure Patent- 'lhe gauges, formed of acentral and main piece ot' iron, combined with a steel plate on eachside, to prevent-lateral friction, as set forth.

by Letters O. C. MEIGS.

Witnesses:

' C. C. SEWARD,

M. H. McOLosKEv.

